Armchair



FIG. 1.1 is a front perspective view of an armchair;

FIG. 1.2 is a rear perspective view;

FIG. 1.3 is a right view thereof;

FIG. 1.4 is a left view thereof;

FIG. 1.5 is a front view thereof;

FIG. 1.6 is a rear view thereof; and

FIG. 1.7 is a top view thereof.

The broken lines shown in the drawings of the armchair are for the purpose of illustrating environment and form no part of the claimed design. 

CLAIM The ornamental design for an armchair, as shown and described. 